Monitoring and Managing Vespa Services

A Practical Guide

Once your Vespa application is up and running, it's crucial to monitor and manage the services effectively to ensure everything functions smoothly. In this guide, we'll explore various commands you can use to inspect and troubleshoot your Vespa deployment.

Checking Running Processes in Vespa

To verify that your Vespa services are running as expected, you can inspect the active processes within the Vespa container:

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docker exec -it vespa bash
[vespa@vespa-container /]$ ps auxwww | grep runserver

Explanation:

• Command: This command logs you into the Vespa container and lists processes related to Vespa's runserver.

• Output: You'll see multiple processes like configserver, configproxy, and config-sentinel, indicating that these components are running. The grep command filters the output to only show lines containing "runserver".

Checking the Application Status

To check if the Vespa application is successfully running, you can use the following command:

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docker exec vespa bash -c 'curl -s --head http://localhost:19071/ApplicationStatus'

Explanation:

• Command: This command sends a HTTP request to Vespa's application status endpoint.

• Output: A 200 OK response indicates that the application is running correctly. This HTTP status confirms Vespa's operational state.

Inspecting Vespa Services

To get a detailed overview of the services running in Vespa, use:

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docker exec -it vespa bash
[vespa@vespa-container /]$ vespa-model-inspect services

Explanation:

• Command: This command lists all the services currently running in the Vespa cluster.

• Output: Services like config-sentinel, configproxy, container, and searchnode are listed, showing the active components in the system.

To get more details about a specific service, such as the config server, you can run:

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vespa-model-inspect service configserver

Explanation:

• Command: Provides detailed information about the configserver service.

• Output: Displays the service's configuration, including network ports used for communication (tcp/vespa-container:19070 and tcp/vespa-container:19071).

Listing and Monitoring Service States

To list the state of each service in the Vespa system, use:

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vespa-sentinel-cmd list

Explanation:

• Command: Lists the state of all services managed by Vespa's sentinel.

• Output: Shows each service's current state (RUNNING), mode (AUTO), and other details, such as process ID and exit status.

Analyzing Logs for Troubleshooting

To troubleshoot issues, reviewing logs is essential. Use the following command to view logs related to the configproxy:

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vespa-logfmt -S configproxy | less

Explanation:

• Command: Formats and displays logs for the configproxy service.

• Output: Presents logs in a human-readable format. The less command allows you to navigate through the log output easily.

Conclusion

By utilizing these commands, you can effectively monitor and manage your Vespa deployment. Regular checks on service status, application health, and logs will help ensure that your Vespa application continues to run smoothly, allowing you to focus on leveraging its capabilities for your data needs.